I've been out of the loop with AoS for a bit now and I'm just returning. I downloaded a couple of skins to install, they're in a nice .kv6 and the sights are in a .png, things are looking good. Open up BaseSkins\Models\Weapons\Rifle , and the files inside beg to differ. What do I have to do exactly? Just toss the file contents inside there? Rename the kv6 mod file to Weapon and toss it in with the .png?

There is Openspades, the fancy looking game and Ace of spades, the older looking game.
Where are you downloading your mods from? The ace of spades mod section or the openspades mod section?

Okay, judging of that directory you have, you're using openspades. First off, you're trying to download guns for ace of spades, not openspades. Go to the openspades mod section to get mods for openspades.